Rick's site/video has info on it. If I remember correctly, the oil is from the flower of the female plant. It is dissolved using alcohol, and heat is used to evaporate the alcohol after, leaving the oil. You can't buy it because it is illegal (active ingredient is THC). Rick can't give it away for free (he was arrested for that). Website has "how to make it":
http://www.phoenixtears.ca/diy.html